package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;


    /*
     * 发送验证码
     * */
    public Result sendCode(String phone, HttpSession session) {
        // 1.提交手机号

        //2.校验手机号,不符合返回错误信息
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }
        //3.生成验证码
        String code = RandomUtil.randomNumbers(6);
        //4.保存到redis
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone, code, LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //发送短信
        log.debug("发送短信验证码成功，验证码：{}", code);

        return Result.ok();
    }

    /*
     * 用户登录
     * */
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(loginForm.getPhone())) {
            return Result.fail("手机号格式错误");
        }

        //2.校验验证码
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        String code = loginForm.getCode();
        if (cacheCode == null || !cacheCode.equals(code)) {
            //3.不一致报错
            return Result.fail("验证码错误");
        }
        //4.根据手机号查询用户
        User user = query().eq("phone", loginForm.getPhone()).one();
        //5.判断用户是否存在
        if (user == null) {
            //不存在创建新用户并保存
            user = getUserByPhone(phone);
        }

        //7存在保存用户信息到redis中

        //7.1!!随机生成token作为登录令牌
        String token = UUID.randomUUID().toString(true);

        //7.2!!将user对象转为hash存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
     /*   Map<String, Object> map =new HashMap<>();
        map.put("id", userDTO.getId().toString());
        map.put("nickName", userDTO.getNickName());
        map.put("icon", userDTO.getIcon());*/
        Map<String, Object> map = BeanUtil.beanToMap(userDTO, new HashMap<>(),
                CopyOptions.create().setIgnoreNullValue(true)//忽略null值
                        .setFieldValueEditor((filedName, filevalue) -> filevalue.toString()));
        //7.3!!存储
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY + token, map);
        //7.4!!设置token有效期
        stringRedisTemplate.expire(LOGIN_USER_KEY + token, LOGIN_USER_TTL, TimeUnit.MINUTES);
        // 8返回!!token
        return Result.ok(token);
    }


    /*
     * 根据手机号创建用户
     * */
    private User getUserByPhone(String phone) {

        //1.创建用户
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));

        //2.保存用户
        save(user);

        return user;
    }
}
